JPS6042532B2 - Regeneration needle that detects changes in capacitance value - Google Patents
Regeneration needle that detects changes in capacitance valueInfo
- Publication number
- JPS6042532B2 JPS6042532B2 JP55125134A JP12513480A JPS6042532B2 JP S6042532 B2 JPS6042532 B2 JP S6042532B2 JP 55125134 A JP55125134 A JP 55125134A JP 12513480 A JP12513480 A JP 12513480A JP S6042532 B2 JPS6042532 B2 JP S6042532B2
- Authority
- JP
- Japan
- Prior art keywords
- needle
- plane
- electrode
- diamond
- crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
- G11B9/07—Heads for reproducing capacitive information
- G11B9/075—Heads for reproducing capacitive information using mechanical contact with record carrier, e.g. by stylus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli
- B24B19/165—Phonograph needles and the like
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/04—Diamond
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B31/00—Diffusion or doping processes for single crystals or homogeneous polycrystalline material with defined structure; Apparatus therefor
- C30B31/20—Doping by irradiation with electromagnetic waves or by particle radiation
- C30B31/22—Doping by irradiation with electromagnetic waves or by particle radiation by ion-implantation
Description
【発明の詳細な説明】
情報信号と対応するピットが渦巻状あるいは同心円状
に配列されることによつて形成された記録跡を備えてい
る情報記録媒体円盤(ディスク)における記録跡上に摺
接して、ディスクの情報信号を静電容量値の変化として
読出すことができるような電極部を備えた静電容量値の
変化検出型再生針を使用して、ディスクの情報信号の読
出しを行 なう静電容量値の変化検出型の情報記録再生
方式は、光学式、その他幾多の型式の情報記録再生方式
に比べて優れた特徴を備えているために、その実用化研
究が推進されて来ている。[Detailed Description of the Invention] An information recording medium disk (disc) having a recording trace formed by pits corresponding to an information signal arranged in a spiral or concentric circle. Then, the information signal on the disk is read out using a capacitance change detection type playback needle equipped with an electrode part that can read out the information signal on the disk as a change in capacitance value. The information recording and reproducing method that detects changes in capacitance has superior features compared to optical and other types of information recording and reproducing methods, and research into its practical application has been promoted. ing.
ところで、静電容量値の変化検出型の情報記録媒再生
方式においては、ディスクからの情報信号の読出しに当
り、ディスク面と摺接した状態で使用される再生針が必
要とされるが、再生針は再生動作時にディスク面との摺
接によつて次第に摩耗して行くから、長期間にわたつて
再生動作の可能な再生針(長寿命の再生針)を得るため
には、再生針の素材として耐摩耗性を有する高硬度材料
が用いられなければならないことは当然である。By the way, in the information recording medium playback system that detects changes in capacitance value, a playback stylus that is used in sliding contact with the disk surface is required to read information signals from the disk. The needle gradually wears out due to sliding contact with the disk surface during playback, so in order to obtain a playback needle that can play over a long period of time (a long-life playback needle), it is necessary to select the material of the playback needle. Naturally, a high hardness material with wear resistance must be used.
第1図は静電容量値の変化検出型再生針の一例のもの
の斜視図であつて、この第1図において1は耐摩耗性を
有する高硬度材料で作られた再生針本体、2は摺接面、
3は電極付着形成面上に付着された電極である。静電容
量値の変化検出型再生針は、それの摺接面2がディスク
の面に摺接されjた状態でディスク面に摺接される電極
3の端部により記録跡中の情報信号を静電容量値の変化
として読出すという再生動作を行なうものであるから、
再生針による再生動作が良好に行なわれるためには再生
針本体1の電極付着形成面に付着された電極3の端部が
常に摺接面2に現われている状態となされていなければ
ならず、そのためには電極付着形成面に対して大きな付
着強度で電極が付着形成されていることが必要とされる
。したがつて、長寿命な静電容量値の変化検出型再針と
しては、再生針本体の素材として耐摩耗性を有する高硬
度材料が使用されていると共に、再生針本体の電極付着
形成面に対して大きな付着強度で電極が付着形成されて
いるものが必要とされるのであるが、耐摩性を有する高
硬度材料として良く知られているダイヤモンドは、それ
に他の物質を大きな付着強度て付着させることが困難で
あり、従来、ダイヤモンドを再生針本体の素材に用いて
静電容量値の変化検出型再生針を作る際は、電極材料と
してダイヤモンドとの間で比較的に大きな付着強度を示
すような導電性物質を選択使用して導電膜を被着させる
ようにしたり、あるいは導電性物質をイオン打込法によ
つてダイヤモンド内に注入して導電層を形成させるなど
の手段が採られて来ている。FIG. 1 is a perspective view of an example of a regenerated needle that detects changes in capacitance, and in this FIG. tangential surface,
3 is an electrode attached on the electrode attachment forming surface. The capacitance value change detection type playback needle detects the information signal in the recorded trace by the end of the electrode 3 that is in sliding contact with the disk surface while its sliding surface 2 is in sliding contact with the disk surface. Since it performs a reproducing operation that reads out changes in capacitance value,
In order for the regenerating needle to perform a good regenerating operation, the end of the electrode 3 attached to the electrode attachment forming surface of the regenerating needle main body 1 must always be exposed to the sliding contact surface 2. For this purpose, it is necessary that the electrode be adhered to the surface on which the electrode is attached with high adhesion strength. Therefore, for long-life capacitance change detection type re-needle, a high hardness material with wear resistance is used as the material of the regenerated needle body, and a In contrast, an electrode is required to be formed with a high adhesion strength, but diamond, which is well known as a high hardness material with wear resistance, allows other substances to be adhered to it with a high adhesion strength. Conventionally, when making a capacitance value change detection type regeneration needle using diamond as the material for the regeneration needle body, diamond was used as the electrode material to exhibit relatively large adhesion strength. Measures have been taken to deposit a conductive film using a selectively conductive material, or to form a conductive layer by injecting a conductive material into diamond using an ion implantation method. ing.
しかしながら、ダイヤモンドとの間の付着強度が比較的
に大きな導電物質であるとして選択された例えばハフニ
ウム、チタンなどの導電性物質を用いて、ダイヤモンド
を素材とする再生針本体における電極付着成面に蒸着法
、あるいはスパッタリング法により導電性薄膜を付着形
成させても、充又に満足すべき付着強度を以つて再生針
本体の電極付着形成面に付着された状態の電極を得るこ
とは困難であり、また、導電性物質をイオン打込法によ
りダイヤモンド内に注入して導電層を形成させても、そ
の導電層だけによつては良好な電極が構成され難く、ま
た、イオンの打込みによつてダイヤモンド結晶に格子欠
陥を生じさせるなどの問題が生じる。However, using a conductive material such as hafnium or titanium, which is selected as a conductive material with relatively high adhesion strength to diamond, vapor deposition is performed on the electrode adhesion surface of the regenerated needle body made of diamond. Even if a conductive thin film is deposited by a method or a sputtering method, it is difficult to obtain an electrode that is adhered to the electrode attachment forming surface of the recycled needle body with sufficient adhesion strength. Furthermore, even if a conductive layer is formed by implanting a conductive substance into diamond using the ion implantation method, it is difficult to form a good electrode using only the conductive layer. Problems such as generation of lattice defects in the crystal arise.
さて、イオン打込法によつてダイヤモンド結晶内に導電
性物質のイオン注入を行なう場合に、ダイヤモンド結晶
における結晶面(110)面に対してイオンの打込みを
行なうようにすれば、この結晶面(110)面では結晶
網面が重複しているために、小さなエネルギで所定のイ
オンの打込み深さが得られると共に、ダイヤモンド結晶
に格子欠陥を発生させ難いとされているが、従来から再
生針本体素材として用いられているダイヤモンドの角注
は、通常、特定な結晶面を備えているものとして天然ダ
イヤモンドの結晶から切り出されてはいないから、再生
針本体における電極付着形成面は元来結晶面(110)
面とはなつておらず、したがつて、再生針本体の電極付
着形成面に対してイオン打込みを行なつてダイヤモンド
結晶内に導電層を形成させた場合には、ダイヤモンド結
晶に格子欠陥を発生させ易いのである。Now, when ions of a conductive substance are implanted into a diamond crystal using the ion implantation method, if the ions are implanted into the crystal plane (110) of the diamond crystal, this crystal plane ( Because the crystal network planes overlap in the 110) plane, it is said that a predetermined ion implantation depth can be obtained with small energy and that it is difficult to generate lattice defects in the diamond crystal. The diamond cornerstone used as a material is usually not cut from natural diamond crystals as it has a specific crystal plane, so the electrode attachment forming surface of the recycled needle body is originally a crystal plane ( 110)
Therefore, when ion implantation is performed on the electrode attachment surface of the regenerated needle body to form a conductive layer within the diamond crystal, lattice defects will occur in the diamond crystal. It is easy to do so.
上記の問題点は、再生針本体の素材として用いられるダ
イヤモンドの角柱を天然ダイヤモンド結晶から切出す際
に、切出されるダイヤモンドの角柱の面が、特定な所要
の結晶面、例えば結晶面(110)面となるようにすれ
ば容易に解決されるのであるが、天然ダイヤモンドはそ
れの外形状が第2図に例示するように平面状の結晶面か
ら成り立つていることは殆んどなく、また、稜線も曲が
つていることが多いから、外形状に表われている結晶面
や稜線を基準として、特定な所要の結晶面を面とする角
柱を天然ダイヤモンドの結晶から切出すことは不可能と
いつてもよい程に困難であり、さればといつて、X線解
析を行なつて特定な所要の結晶面を面とするような角柱
を天然ダイヤモンドの結晶から切出すようにしたのでは
、角柱は非常に高価なものとなつてしまい、このような
角柱は再生針本体の素材としては到底採用し得ないので
ある。The above-mentioned problem is that when the diamond prism used as the material for the recycled needle body is cut out from a natural diamond crystal, the face of the cut diamond prism has a specific required crystal plane, for example, the crystal plane (110). This problem can be easily solved by making it a plane, but the external shape of natural diamonds is almost never made up of planar crystal planes, as shown in Figure 2. Because the ridge lines are often curved, it is impossible to cut out a square column from a natural diamond crystal with a specific required crystal plane as a reference, based on the crystal planes and ridge lines that appear in the external shape. It is always extremely difficult to do this, and it would be better to use X-ray analysis to cut out a rectangular prism with a specific required crystal plane from a natural diamond crystal. The prismatic pillars become very expensive, and such prismatic pillars cannot be used as the material for the recycled needle body.
第i図において、4は天然ダイヤモンド結晶の外形状の
一例を示したもので、5は切出されをべきダイヤモンド
の角柱を示している。また、以上のことから判かるよう
に天然ダイヤモンド結晶より切出された通常のダイヤモ
ンドの角柱を再生針本体の素材として再生針を作る場合
に、特定な所要の結晶面(110)面を再生針本体にお
ける電極付着形成面とするのには、研磨量が多くなつて
研磨加工の所要時間が大となるということも問題となる
のである。本発明は、外形状が平面状の結晶面から成り
立つていて、結晶面間の稜線も直線状を呈している人造
ダイヤモンドを再生針本体の素材として用い、素材とな
るダイヤモンド結晶における相隣る2つの結晶面(11
1)または(100)の稜線部を、その稜線部に平行で
、かつ、前記した相隣る2つの結晶面とのなす角が略々
等しいような平面状あるいは曲面状に成形して電極付着
形成面とした再生針を提供することにより、既述した従
来の再生針における諸問題を良好に解決してものであり
、以下、添付図面を参照しながら本発明の静電容量値の
変化検出型再生針の具体的な内容を詳細に説明する。In Fig. i, 4 shows an example of the external shape of a natural diamond crystal, and 5 shows a square prism of the diamond to be cut out. In addition, as can be seen from the above, when making a recycled needle using a regular diamond prism cut from a natural diamond crystal as the material for the recycled needle body, it is possible to make the recycled needle with a specific required crystal plane (110). Another problem with forming the surface of the main body for electrode attachment is that the amount of polishing increases and the time required for the polishing process increases. The present invention uses an artificial diamond whose outer shape is made up of planar crystal planes and whose ridge lines between the crystal planes are linear as a material for the regenerated needle body, and two crystal planes (11
1) Form the ridgeline of (100) into a flat or curved shape that is parallel to the ridgeline and has approximately equal angles with the two adjacent crystal planes, and attach the electrode. By providing a regenerated needle with a formed surface, the various problems of the conventional regenerated needle described above are successfully solved.Hereinafter, with reference to the attached drawings, the method for detecting changes in capacitance value of the present invention will be explained. The specific contents of the mold regeneration needle will be explained in detail.
第3図及び第4図は人造ダイヤモンドの結晶形態の代表
的なものの2例を示したものであり、このような結晶形
態の人造ダイヤモンドは、市販の人造ダイヤモンド(例
えば、米国GE社製のMPSDタイプの人造ダイヤモン
ド)に高い確率で存在が認められている。Figures 3 and 4 show two typical examples of crystalline forms of artificial diamonds, and these crystalline forms of artificial diamonds include commercially available artificial diamonds (for example, MPSD manufactured by GE Corporation in the United States). The existence of artificial diamonds (types of artificial diamonds) is recognized with a high probability.
第3図示の結晶形態の人造ダイヤモンドは、6角形状を
なす(111)面と、4角形状をなす(100)面とに
よつて外形状が形成されており、また、第4図示の結晶
形態の人造ダイヤモンドは8角形の(100)面と3角
形の(111)面とによつて外形状が形成されている。The artificial diamond in the crystal form shown in the third figure has an outer shape formed by a hexagonal (111) plane and a quadrangular (100) plane. The outer shape of an artificial diamond is formed by an octagonal (100) plane and a triangular (111) plane.
第3図中における点線図示の8面体の外形状は、参考の
ために示してもので、第3図示のダイヤモンド結晶にお
ける複数個の(111)面は、ダイヤモンド結晶が第3
図中で点線により図示されている8面体であつたとした
場合の8個の面の各一部であり、また、複数個の(10
0)面は、ダイヤモンド結晶が第3図中で点線により図
示されている8面体であつたとした場合の8つの頂角部
の裁頭断面と対応している。第5図は、第3図示のよう
な結晶形態を有する人造ダイヤモンドを素材として本発
明の再生針を作る楊合の具体的な説明を行なうための説
明用斜視図であり、次に、この第5図を参照して本発明
の再生針について詳細に記述する。第5図において、面
5〜6は、それぞれ6角形状を呈する結晶面(111)
面であり、また、面10,11はそれぞれ4角形状を呈
する結晶面(100)面である〔6角形状の(111)
面及び4角形状の(100)面は、第5図中に符号6〜
9,10,11などで示したもの以外にも存在している
が、第5図中には表現されていない〕。第5図示の結晶
形態を有する人造ダイヤモンドにおいて、ダイヤモンド
の結晶外形面を構成している多数の結晶面の内で、相隣
る2つの結晶面が同等な結晶面となつているのは結晶面
(111)面であるが、今、面6と面9とを、相隣る2
つの結晶面(111)面の代表にとりあげて以下の説明
を行なうことにする。The outer shape of the octahedron indicated by the dotted line in FIG. 3 is shown for reference.
If it is an octahedron shown by dotted lines in the figure, it is a part of each of the eight faces, and it is also a part of a plurality of (10
The 0) plane corresponds to a truncated section of eight apex corners if the diamond crystal were an octahedron shown by dotted lines in FIG. FIG. 5 is an explanatory perspective view for specifically explaining the process of making a recycled needle of the present invention using an artificial diamond having a crystal form as shown in FIG. The regenerated needle of the present invention will be described in detail with reference to FIG. In FIG. 5, planes 5 and 6 are crystal planes (111) each having a hexagonal shape.
Also, surfaces 10 and 11 are each a (100) crystal plane exhibiting a quadrangular shape [a hexagonal (111)
The planes and the (100) planes of the quadrangular shape are denoted by numerals 6 to 6 in FIG.
9, 10, 11, etc. exist, but they are not represented in FIG. 5]. In the artificial diamond having the crystal form shown in Figure 5, among the many crystal planes that make up the outer surface of the diamond, only two adjacent crystal planes are equivalent crystal planes. (111) plane, but now planes 6 and 9 are connected to two adjacent planes.
The following explanation will be made by taking up one representative crystal plane (111).
前記した面6と面9との境界をなす稜線12に着目し、
前記した稜線12に平行でかつ、前記した面6と面9と
のなす角α,βが略々等しくなるような平面13を考え
ると、この面13は結晶面(110)面となる。第5図
中において、面6上の線11と面9上の線12とのなす
角γは、相隣る2つの(111)面の面角であり、この
面角γは結晶学的に一定値を示すものである。前記の面
13は、既述のように、相隣る2つの(111)面の境
界の稜線12と平行で、かつ、面6と面9とのなす角α
,βが略々等しくなされるような平面であるから、この
面13は結晶学的に略々(110)面となるものであり
、したがつて、この面13は再生針本体の電極付着形成
面として最適な面となる。そして、面6と面9との境界
の部分に平面13で示される電極付着形成面を形成させ
るには、稜線12に平行でかつ、面6と面7とのなす角
α,βが略々等しくなるように稜線部を研磨加工するだ
けでよいので、前記の加工は極めて容易に行なわれうる
のである。Focusing on the ridgeline 12 that forms the boundary between the surfaces 6 and 9 described above,
Considering a plane 13 that is parallel to the ridgeline 12 described above and in which the angles α and β formed by the planes 6 and 9 are approximately equal, this plane 13 becomes a crystal plane (110). In FIG. 5, the angle γ between the line 11 on the plane 6 and the line 12 on the plane 9 is the plane angle of two adjacent (111) planes, and this plane angle γ is crystallographically It indicates a constant value. As mentioned above, the surface 13 is parallel to the ridgeline 12 of the boundary between the two adjacent (111) surfaces, and the angle α between the surfaces 6 and 9 is
, β are approximately equal, this plane 13 is approximately a (110) plane crystallographically. This will be the best surface. In order to form the electrode adhesion forming surface shown by the plane 13 at the boundary between the surfaces 6 and 9, it is necessary to make the electrode adhesion formation surface parallel to the ridge line 12 and where the angles α and β between the surfaces 6 and 7 are approximately equal to each other. Since it is only necessary to polish the ridgeline portions so that they are equal, the above-mentioned processing can be performed extremely easily.
すなわち、人造ダイヤモンドにおいて、その外形状を形
成している各結晶面間の面角は、すべて結晶学的に定ま
つており、また、各結晶面は良好な平面度を有している
と共に、各稜線は直線であるから、面13を形成させる
場合の研磨加工は面6、面9、及び稜線12などを基準
として高精度で行なうことができ、したがつて、結晶面
(110)面が電極付着形成面てあるような再生針を簡
単に得ることができるのである。電極付着成面となされ
る面13には、イオン打込法、スパッタリング法、蒸着
法、その他適宜の手段の適用によつて電極が付着形成さ
れるのであり、また、人造ダイヤモンド結晶は、研磨加
工などによつて必要とされる外形状の再生針となされる
のである。In other words, in an artificial diamond, the face angles between the crystal planes that form its outer shape are all determined crystallographically, and each crystal plane has good flatness. Since each ridgeline is a straight line, the polishing process for forming plane 13 can be performed with high precision using planes 6, 9, ridgeline 12, etc. as references, and therefore the crystal plane (110) is A regenerated needle with an electrode-attached surface can be easily obtained. Electrodes are formed on the surface 13 on which the electrodes are attached by applying ion implantation, sputtering, vapor deposition, or other appropriate means, and the artificial diamond crystal is not polished. It is made into a recycled needle with the external shape required by, for example.
上記の例においては、人造ダイヤモンドにおける面6と
面9とを相隣る2つの(111)面であるとして説明し
たが、相隣る2つの(111)面として、面6と面7、
面7と面8、面8と面9、その他の組合わせのものをと
り上げて、そのとりあげられた1組の相隣る2つの(1
11)面間の稜線部”について、稜線12を含む稜線部
について既述したと同様な手段により、電極付着形成面
となる(110)面を形成させうることはいうまでもな
い。In the above example, plane 6 and plane 9 in the artificial diamond were explained as two adjacent (111) planes, but plane 6 and plane 7,
Take surfaces 7 and 8, surfaces 8 and 9, and other combinations, and compare the two adjacent (1
11) Regarding the ridgeline portion between the surfaces, it goes without saying that the (110) plane, which becomes the electrode adhesion formation surface, can be formed by the same means as already described for the ridgeline portion including the ridgeline 12.
なお、第5図中における線14は研磨容易方向を示して
おり、また、符号dは最低でも再生針として必要とされ
る電極巾(例えば0.8pm)よりも若干大きな寸法で
ある。また、第4図示の結晶形態の人造ダイヤモンドに
ついては、相隣る2つの(100)面間の稜線部につい
て、第3図(第5図)示の結晶形態の人造ダイヤモンド
に関して既述したと同様な手段により、電極付着形成面
となる(100)面を形成させることができるのである
。Note that the line 14 in FIG. 5 indicates the direction of easy polishing, and the symbol d indicates a dimension slightly larger than at least the electrode width (for example, 0.8 pm) required for a regenerated needle. Regarding the artificial diamond in the crystalline form shown in Figure 4, the ridge line between two adjacent (100) planes is the same as described above for the artificial diamond in the crystalline form shown in Figure 3 (Fig. 5). By this means, it is possible to form a (100) plane, which becomes the electrode adhesion formation surface.
これまでの記載においては、相隣る2つの(111)面
間の稜線部または相隣る(100)面間の稜線部に対す
る研磨加工によつて形成させた電極付着形成面13が平
面てあるとしてきたが、相隣る2つの(111)面間の
稜線部、または相隣る(100)面間の稜線部に対する
研磨加工によつて形成される電極付着形成面が、凸状の
曲面(第5図中の点線15参照)または凹状の曲面(第
5図中の破線16参照)となされてもよく、この場合に
おける電極付着形成面はそれの母線一つが(110)面
中に含まれているものとなるのである。In the description so far, the electrode attachment forming surface 13 formed by polishing the ridgeline between two adjacent (111) planes or the ridgeline between two adjacent (100) planes is flat. However, the electrode attachment forming surface formed by polishing the ridgeline between two adjacent (111) planes or the ridgeline between two adjacent (100) planes is a convex curved surface ( (see dotted line 15 in Fig. 5) or a concave curved surface (see dotted line 16 in Fig. 5); in this case, the electrode adhesion forming surface has one generatrix included in the (110) plane. It becomes what it is.
以上、詳細に説明したところから明らかなように、本発
明の静電容量値の変化検出型再生針は、平面状の結晶面
及び直線状の稜線によつて外形状が構成されている人造
ダイヤモンドを使用し、それの相隣る2つの(111)
面間の稜線部または(100)面間の稜線部に対して、
簡単な研磨加工を施こすだけで、(110)面の平面電
極付着形成面、または一つの母線が(110)面に含ま
れているような曲面状の電極付着形成面が容易に構成さ
れた再生針を得ることができるのであり、本発明によれ
ば、電極付着形成面に対して大きな付着強度で電極が付
着された再生針を容易に得ることができ、また、電極付
着形成面を得るための研磨加工量も少なくて済むので安
価な人造ダイヤモンドの使用と相俟つて、長寿命な再生
針を安価に提供することを可能とするのである。As is clear from the detailed explanation above, the capacitance value change detection type regeneration needle of the present invention is an artificial diamond whose outer shape is constituted by planar crystal planes and linear ridge lines. and its two adjacent (111)
For the ridgeline between planes or the ridgeline between (100) planes,
By simply performing a simple polishing process, a flat electrode attachment surface of the (110) plane or a curved electrode attachment formation surface in which one generatrix is included in the (110) plane could be easily constructed. According to the present invention, it is possible to easily obtain a regenerated needle in which an electrode is attached to the electrode adhesion forming surface with a large adhesion strength, and also to obtain an electrode adhesion forming surface. Since the amount of polishing required for polishing is small, this combined with the use of inexpensive artificial diamonds makes it possible to provide long-life recycled needles at low cost.
【図面の簡単な説明】
第1図は再生針の従来例のものの斜視図、第2図は天然
ダイヤモンドからの角柱の切出しを説明する図、第3図
及至第5図は本発明の再生針の素材となる人造ダイヤモ
ンドの斜視図である。
6〜9・・・(111)面、10,11・・・(100
)面、13・・・電極付着形成面。[Brief Description of the Drawings] Fig. 1 is a perspective view of a conventional example of a regenerated needle, Fig. 2 is a diagram illustrating cutting out a prism from a natural diamond, and Figs. 3 to 5 are a regenerated needle of the present invention. FIG. 6 to 9...(111) planes, 10, 11...(100
) surface, 13...electrode adhesion formation surface.
Claims (1)
た記録跡を有する情報記録媒体円盤における記録跡に摺
接し、前記の記録跡中の情報信号を静電容量値の変化に
応じた電気量の変化として取出しうるような電極部を備
えている静電容量値の変化検出型再生針であつて、再生
針本体の素材として人造ダイヤモンドを用い、前記素材
のダイヤモンドの結晶外形面を構成している相隣る2つ
の結晶面{111}または{100}の稜線部を、その
稜線に平行で、かつ、前記した相隣る2つの結晶面との
なす角が略々等しいような平面状あるいは曲面状に成形
して電極付着形成面とし、前記の電極付着形成面に電極
を付着させて電極部とした構成を備えさせてなる静電容
量値の変化検出型再生針。1. Sliding contact with a recording trace in an information recording medium disk having a recording trace formed by an arrangement of pits corresponding to an information signal, and converting the information signal in the recording trace into an electric quantity according to a change in capacitance value. A regeneration needle for detecting changes in capacitance, which is equipped with an electrode part that can be taken out as a change in the capacitance value, wherein an artificial diamond is used as the material of the regeneration needle body, and the crystal outer surface of the diamond of the material is configured. A plane or A capacitance value change detection type regenerating needle, which is formed into a curved shape to form an electrode adhesion forming surface, and has an electrode attached to the electrode adhesion forming surface to form an electrode part.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55125134A JPS6042532B2 (en) | 1980-09-09 | 1980-09-09 | Regeneration needle that detects changes in capacitance value |
GB8126955A GB2085639B (en) | 1980-09-09 | 1981-09-07 | Capacitance detection type record stylus and method for making the stylus |
CH578281A CH644222A5 (en) | 1980-09-09 | 1981-09-08 | CAPACITIVE DETECTION STYLE AND MANUFACTURING METHOD. |
DE19813135518 DE3135518A1 (en) | 1980-09-09 | 1981-09-08 | SCAN NEEDLE IN ACCORDANCE WITH THE CAPACITY DETECTION PRINCIPLE AND METHOD FOR THEIR PRODUCTION |
US06/300,451 US4410974A (en) | 1980-09-09 | 1981-09-08 | Capacitance detection type record stylus and method for making the stylus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55125134A JPS6042532B2 (en) | 1980-09-09 | 1980-09-09 | Regeneration needle that detects changes in capacitance value |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5750345A JPS5750345A (en) | 1982-03-24 |
JPS6042532B2 true JPS6042532B2 (en) | 1985-09-24 |
Family
ID=14902693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55125134A Expired JPS6042532B2 (en) | 1980-09-09 | 1980-09-09 | Regeneration needle that detects changes in capacitance value |
Country Status (5)
Country | Link |
---|---|
US (1) | US4410974A (en) |
JP (1) | JPS6042532B2 (en) |
CH (1) | CH644222A5 (en) |
DE (1) | DE3135518A1 (en) |
GB (1) | GB2085639B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5938653B2 (en) * | 1980-05-30 | 1984-09-18 | 日本ビクター株式会社 | How to make needles with electrodes |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943276A (en) * | 1974-06-03 | 1976-03-09 | Zenith Radio Corporation | Record tracking pickup structure for a capacitive disc |
-
1980
- 1980-09-09 JP JP55125134A patent/JPS6042532B2/en not_active Expired
-
1981
- 1981-09-07 GB GB8126955A patent/GB2085639B/en not_active Expired
- 1981-09-08 CH CH578281A patent/CH644222A5/en not_active IP Right Cessation
- 1981-09-08 US US06/300,451 patent/US4410974A/en not_active Expired - Fee Related
- 1981-09-08 DE DE19813135518 patent/DE3135518A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
US4410974A (en) | 1983-10-18 |
DE3135518C2 (en) | 1987-03-26 |
CH644222A5 (en) | 1984-07-13 |
GB2085639A (en) | 1982-04-28 |
JPS5750345A (en) | 1982-03-24 |
DE3135518A1 (en) | 1982-04-08 |
GB2085639B (en) | 1984-09-05 |
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